package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UsersMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Component
public class UserServiceImpl implements UserService {
    public static final String WX_Login ="https://api.weixin.qq.com/sns/jscode2session"; ;
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UsersMapper userMapper;
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        String openid = getOpenId(userLoginDTO.getCode());
        if (openid== null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.getByOpenId(openid);
        //新用户自动注册
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }
    private String getOpenId(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getAppsecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String jsonString = HttpClientUtil.doGet(WX_Login, map);
        JSONObject jsonObject = JSON.parseObject(jsonString);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
